Problem with a *.pgm image

[herb]

Hello Pierre,

On my Windows 10 system I work with Nconvert version 7.136 to convert images to *.jpg images.

Using only Ascii characters inside the filename I have seen the following problem with *pgm images:
I use the following command

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nconvert.exe -half_res -ignore_errors -thumb 1920 1920 -overwrite -out jpeg -o OUTPUTFILENAME-without-extension SOURCEFILE

In case of SOURCEFILE is a *.pgm image (or maybe another filetype) the outputfile is created without file-extension ".jpg".

Best regards
herb

[xnview]

i can't reproduce, i've tried

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nconvert -out jpeg -o c:\output\test file.pgm

[herb]

Hello Pierre,

thanks for your investigations.
I have to say sorry, because I did a big mistake.

The problem does not typically occur with *.pgm images.

Further tests showed that it occurs with all files that contain a dot "." in the filename: e.g. test.ascii.pgm

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nconvert.exe -half_res -ignore_errors -thumb 1920 1920 -overwrite -out jpeg -o test.ascii test.ascii.pgm
nconvert.exe -half_res -ignore_errors -thumb 1920 1920 -overwrite -out jpeg -o test.x test.x.psd

Both commands create output-files without extension.jpg

Best regards
herb

[xnview]

ok, i understand now. The problem when using -o is: do you want to have test.ascii as output filename or test.ascii.jpg, i can't know

[herb]

Hello Pierre,

I think that I now understand the logic used by NConvert:

• -out defines the type of image to be generated

• -o defines the filename

In case of the filename does not contain a dot - NConvert adds an extension which depends on filetype -out
In case of the filename does contain a dot - NConvert handles it as a filename with extension

When I am right, nothing has to be changed.

Best regards
herb